Polyamide 6.9 nanofibres electrospun under steady state conditions from a solvent/non-solvent solution

Schoenmaker, Bert De; Goethals, Annelies; Schueren, Lien Van der; Rahier, Hubert; Clerck, Karen De

doi:10.1007/s10853-012-6266-9

Cited by 24 publications

(21 citation statements)

References 30 publications

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“…To study the effect of the solvent ratio, 14 wt% PA solutions with 100 to 40 vol% formic acid were attempted to [21]. Table 3 shows that the average diameter of the fibre deposition decreases with increasing RH for PA 4.6, in agreement with Table 2.…”

Section: Influence Of a Changing Solvent Ratio At Different Humiditiessupporting

confidence: 75%

“…The steady state electrospinning conditions, which are necessary to allow for uniform and reproducible nanofibres [8,[21][22][23], were analysed and also the deposition area, well-defined if the nanofibres are produced under steady state, was determined. Table 2 gives an overview of the diameter of these circular deposition areas for the PA 4.6 and PA 6.9 solutions, measured after one minute electrospinning.…”

Section: Influence Of Varying Polymer Concentration At Different Humimentioning

confidence: 99%

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Effect of the relative humidity on the fibre morphology of polyamide 4.6 and polyamide 6.9 nanofibres

et al. 2012

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To obtain uniform and reproducible nanofibres, it is important to understand the effect of the different electrospinning parameters on the nanofibre morphology. Even though a lot of literature is available on the electrospinning of nanofibres, only minor research has been performed on the effect of the relative humidity (RH). This paper investigates the influence of this parameter on the electrospinning process and fibre morphology of the hydrophilic polyamide 4.6 and the less hydrophilic polyamide 6.9. First, the electrospinning process and deposition area of the nanofibres is examined at 10, 50 and 70 % RH. Subsequently, the effect of the polyamide concentration and solvent ratio on the fibre morphology is investigated using scanning electron microscopy and differential scanning calorimetry. It was found that the nanofibre diameter decreased with increasing RH. This resulted in less stable crystals for polyamide 4.6 while electrospinning of polyamide 6.9 at higher RH led to slightly more stable crystals. In conclusion, the water affinity of a polymer is an important factor in predicting the nanofibre morphology at different humidities

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Section: Influence Of a Changing Solvent Ratio At Different Humiditiessupporting

confidence: 75%

Section: Influence Of Varying Polymer Concentration At Different Humimentioning

confidence: 99%

Effect of the relative humidity on the fibre morphology of polyamide 4.6 and polyamide 6.9 nanofibres

et al. 2012

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“…This allowed for the demarcation of a steady state region within the steady state table presenting the possible combinations of solvent ratio and polymer concentration for which a steady state is possible. This methodology has been used previously to verify the steady states for electrospinning different types of polyamides (De Vrieze et al 2008De Schoenmaker et al 2012) and polycaprolactones (Van der Schueren et al 2011).…”

Section: Methodsmentioning

confidence: 99%

“…PES has a low miscibility in pure DMF and also requires relatively high environmental humidity to electropin (Fashandi and Karimi 2014). For other polymers, such as cellulose (Ahn et al 2012), polyamides De Schoenmaker et al 2012) and polycaprolactone (Van der Schueren et al 2011), stable electrospinning was accomplished using binary solvents. The use of binary solvent systems resulted in a larger window for steady state electrospinning.…”

Section: Solvent Studymentioning

confidence: 99%

“…Steady state electrospinning is the key to a successful scale up of the electrospinning process (Spivak et al 2000;De Vrieze et al 2011;De Schoenmaker et al 2012) and as a first step the steady state conditions on a single nozzle setup should be studied. Steady state electrospinning requires that all polymer in the solution pumped into the electric field is transformed into nanofibers.…”

Section: Introductionmentioning

confidence: 99%

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Steady state electrospinning of uniform polyethersulfone nanofibers using a non-heated solvent mixture

et al. 2015

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Electrospinning is the most promising method for the large-scale production of nanofiber membranes. Multi-nozzle systems have already proven to be successful in producing polyamide nanofiber membranes suitable for water filtration. In this contribution, conditions for steady state electrospinning of polyethersulphone were investigated. Steady state electrospinning of PES was only possible for a limited number of electrospinning parameter combinations. Only a polymer concentration of 25 and 26 wt% resulted in defect-free nanofiber membranes. The solvent ratio of DMF:NMP can be varied from 95:5 (v:v%) to 85:15 (v:v%) to generate uniform nanofibers with average diameters varying from 300 to 730 nm all with relatively narrow standard deviation as low as 20 %. These results, thus, allow for a well-chosen set of electrospinning parameters for scaling up electrospinning of polyethersulphone nanofiber membranes.

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Handbook of Nanofibers

2020

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Polyamide 6.9 nanofibres electrospun under steady state conditions from a solvent/non-solvent solution

Cited by 24 publications

References 30 publications

Effect of the relative humidity on the fibre morphology of polyamide 4.6 and polyamide 6.9 nanofibres

Effect of the relative humidity on the fibre morphology of polyamide 4.6 and polyamide 6.9 nanofibres

Steady state electrospinning of uniform polyethersulfone nanofibers using a non-heated solvent mixture

Handbook of Nanofibers

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